ServeNebraska week is April 20 to 26.
Heineman, first lady Sally Ganem and Jamesena Moore, chairwoman of ServeNebraska, joined for a news conference Monday to publicize the effort.
Moore says she hope to see volunteerism recorded in all 93 counties during ServeNebraska week.
Heineman says Nebraska ranks fifth across the country in terms in terms of volunteerism. Moore says she wants that ranking to climb to No. 1.
Heineman and Ganem will participate by reading to fourth grade students at McPhee elementary school in Lincoln on April 24.
To register a volunteer activity or for more information on volunteering, visit: www.serve.nebraska.gov.